CVE-2026-90032 - media: usbtv: keep device alive while ALSA card exists

CVE-2026-90032 - media: usbtv: keep device alive while ALSA card exists

https://cvefeed.io/rssfeed/latest.atom / Wed, 09/16/2026 - 13:32
CVE ID :CVE-2026-90032
Published : Sept. 16, 2026, 10:33 a.m. | 34 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: media: usbtv: keep device alive while ALSA card exists The ALSA PCM callbacks store the driver state in pcm->private_data. An open PCM file can outlive USB disconnect because usbtv_audio_free() uses snd_card_free_when_closed(). The disconnect path can then drop the V4L2 device reference and free struct usbtv before ALSA releases the substream, so a later close dereferences freed memory in snd_usbtv_pcm_close(). Take a V4L2 device reference for the ALSA card and drop it from the card private_free callback. This keeps struct usbtv valid until ALSA has closed the remaining files and freed the card.
Severity: 0.0 | NA
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